Electrical switch.



BTW-1816,0728.

- J. F. MoE-LROY.

ELECTRICAL SWITCH. APPLI 0ATION-FILED APR.30, 1903.

'Swivelled PATENTED MAR. 27, 1906'.

,fl 2. $4M: a 214% I I j Hog 816,628.

'T0 ctll whom it may concern.

n I -D TAEE PATENT '1 JAMES F. MOELROY, F ALBANY, NEW YORK, ASSIGNOR TO CONSOLIDATED (JAR HEATING COMPANY," OF ALBANY, NEW YORK, A CORPORATION or WEST VIRGINIA.

Beit known that I, JAMES F. McELnoY- a citizen of the United States, residing at Alban' county of Albany', and State of New Yor havev invented certain new anduse Improvements in Electrical Switches, 01' which the following'specification and the acv companying drawing-set forth the'principlesthereof andfalso alsan illustration thatiorm best out of the various forms inwhich'its principles'niay beembodied. I

of'iny invention which I now consider the In the drawing 1 have shown aperspectiv'e ,v'iew of my invention.

11121111"f'electricdighting apparatus for railwayve j'elesII employ a dynamo driven by "-a'n axle of ftheveh cle, and since the vehicle, must runata changeable speed it is necesto provide an automatic switch that ,sary 2o 11 act at'ag1venminimum speed to connect H the dyiiaino to or disconnect it from the-0 crating-circuit on the vehicle. It is a spec al feature of system that .suehnut-out switchis controlled bythe regulating mechanism' used for governing) the dynamo to maintain its action constant, so 'far as speed changes'are concerned; but variable sofar as load changes are concerned, the load being dependentvupon thelamps and storage battery which it may be operating at any given time. It is not necessary in the present case to describe'the details of the re'gulatormechanism which in my system causes theswitch to operate at the right moment-via, when the increasing or decreasing speed gives the dynamo a tendencyto rise above". or fall below Y the prescribed otential. The invention re systems the eerrespondin switch is o erated' by a special magnetand orms an in eperidlates to a pecu 'ar construction of the contacting parts of the switchwith reference. to

theduty the switch is-to perform. In other ent device separate from the regulator: My. present invention concerns this switch howrated. i

Referring to the drawin A represents the j switch 'l'ever, which is-of t e an l'e' 'or elbow type, pivoted 'in the framework of the a paratus at the point d. Thepivr tis at t e angle of the lever which is provided with a horizontal arm A". v The switch-contacts are ended by the opposite or wertical arm :A'of.

. of the switc -leve'r.

equally good contact between ELECTRICAL SWIT I' C I J-Ir the angle-lever and comprise two springs G- and G, which are e ectrical connection; with each other and serve to close the circuit Patented March 27,1906.

Application filed .Apri130,1903- Serial No. 164,924[ 7 I by engaging with two insulated. contact springs F and LE; thatform'the respective stationary terminals of .the circuit tohe closed. lv 'g' I The leading feature of my presentinvention lies in moimting the two sprin G and 'G on a' swivel, which in the'examp e shown has an axis arallel with the verticalarm'A The swivel has but .a

limited play, whiehis, however, sufficient to equalize the pressureofthe two movable springs G and G against the, respective staof lever-arm 2 is a lprojecting stud H, that is carried-by but insu ble that surrounds the lower end oft e stud tionary sprin s Fian'd F. On the upper end i ated from th'earmbyan insulating-washer a and aninsulatin -th1mwhereit sets into the socket formed on the i end ofthe arm A for its reception. At-the upperend'of stud H and swiveling thereon 1s the equalizing cross bar C,.- t'o-'which' the I spfing's'G and G are attachedby screws g. T

e swiveling is efiiected by-a neck 'on the upper end of the stud H,- which asses through I theequalizing cross-bar, {To old the crossbar in place and to'limit'its swiveling pla a ring being provided on its un er side with a -rmg D is placed on the neck of the stu H above thecross -bar and held b a screw b, the a shoulder J ,which engages a similar shoulder J on the upper side of the cross-bar when the limit ofthe play is reached. The stationary contactsprings F- and F are attached, re-,,

ates K and K, which inturn are secured to insiilating-blocksl P1 fastened to the opspectively, to the .upper ends of-the vertical P posite sides of a yertic'al'rib'E of the framep work E. By thi's means tlfe two' movable contact-springs G and G are mounted on the swiveling equalizing crossbar' 0, which is pivoted at a point'bet'ween the two springs to the end-of lever-arm E 0n anax'is whichis vertidalj'and hence transverse tothe horizont'al line of movement' f the levezear'm' A}, which operates it. The result is that there is necessarily an equally firm pressure and an springs G and F on the one side and springs.

and F on the other.- This result iSfitlSO attained with-' out any nice adjustment of either 'set of c(n the pivot and be "turned :into enga ement with its mate subsep uently and wit pressureequal to that 0 the first set. The arrangement avoids the mechanical difficulty 1n making one rigid set ofsprings fit another,

rigid set with no yielding element except the springs themselves, which cannot well be sufficiently flexible and also sufficiently-sub stantial and yet be operated with certainty by a small power. It isalso to'be remember'edthat the reliability of the apparatus depends wholly on the cut-out switch that may by sticking or by imperfect contact dis,- able and perhaps seriously injure the-apparatus.

What I claim as new, and desire to secure by Letters Patent, is 1. An electric switch comprising a swiveled bar having a pair of spring-contacts the faces of which are adapted to yield-in a direction substantially transverse to -the plane of oscillation of said bar, a coacting pair of contacts, and meansfor moving one set of contacts toward and from the other.

2. An electric switch comprising-a movable member, a bar swiveled to said member and having spring-contacts on= opposite-sides of its axis of movement, the axis ofssaid-swiveled bar being on a lane transverseto the plane of movement 0 said movable member, and a coacting pair of sprin -contacts, the

faces ofsaid contacts being a apted to yield.

in a direction substantially transverse to:the plane of movement of said swiveled bar.

3. An electric switch comprising two-Pairs of spring-contacts having their contactin faces adapted to slide when making an breaking the circuit, a swiveled bar carrying one pair of said contacts, and means for movmg said contacts relatively to each other-in a direction substantiallyiin the plane of said *sliding'faces.

4. An electric switch havingtwo pairs of ncontacts,xthe'contacts of one pair bemg insuswiveled barin the direction described.

5. In an automatic'switch for a train-lighting system, the combination with stationary and movable sets of contacts, ofan operating device therefor, said device comprising a pivoted member having its free end movable toward and from'the-stationary set of con tacts, a bar carrying the other set ofcontacts and pivotally connected with the end of said pivoted member, the axis of movement of said bar being coincident with the longitudinal center of said pivoted member.

6,. A movable switch-arm having an equalizing-bar pivoted thereto on an axis substantially transverse to the direction of movement of said'arm,.aset of spring-contacts on said equalizing-bar, and a second set of con- ;tacts cooperating with those on the said equalizing-bar, the said contacts having ylelding faces in a plane crossing the plane of movement-of theswitch-arm and e ualizingbar, whereb said contacts -will s ide rela- .tivelv td'e'ac other-when makingandbreakin t e circuit;

Witness whereof I have hereunto set my hand, before two subscribing witnesses, this 28th=day of April,- 1903.

- JAMES F. 'MoELROY. :Witnesses: 'EBEULAH CABLE,

ERNEST D. JANSEN. 

